Add semantic tagging, search, favourite/NSFW filtering, and LLM job queue

Replaces old list-format tags (which duplicated prompt content) with structured
dict tags per category (origin_series, outfit_type, participants, style_type,
scene_type, etc.). Tags are now purely organizational metadata — removed from
the prompt pipeline entirely.

Adds is_favourite and is_nsfw columns to all 8 resource models. Favourite is
DB-only (user preference); NSFW is mirrored in JSON tags for rescan persistence.
All library pages get filter controls and favourites-first sorting.

Introduces a parallel LLM job queue (_enqueue_task + _llm_queue_worker) for
background tag regeneration, with the same status polling UI as ComfyUI jobs.
Fixes call_llm() to use has_request_context() fallback for background threads.

Adds global search (/search) across resources and gallery images, with navbar
search bar. Adds gallery image sidecar JSON for per-image favourite/NSFW metadata.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

templates/gallery.html

@@ -57,23 +57,50 @@
       </select>
     </div>
 
+    <!-- Favourite filter -->
+    <div class="col-auto">
+      <label class="form-label form-label-sm mb-1">&nbsp;</label>
+      <div class="form-check mt-1">
+        <input class="form-check-input" type="checkbox" name="favourite" value="on" id="favFilter" {% if favourite_filter == 'on' %}checked{% endif %} onchange="this.form.submit()">
+        <label class="form-check-label small" for="favFilter">&#9733; Favourites</label>
+      </div>
+    </div>
+
+    <!-- NSFW filter -->
+    <div class="col-auto">
+      <label class="form-label form-label-sm mb-1">Rating</label>
+      <select name="nsfw" class="form-select form-select-sm" onchange="this.form.submit()">
+        <option value="all" {% if nsfw_filter == 'all' %}selected{% endif %}>All</option>
+        <option value="sfw" {% if nsfw_filter == 'sfw' %}selected{% endif %}>SFW only</option>
+        <option value="nsfw" {% if nsfw_filter == 'nsfw' %}selected{% endif %}>NSFW only</option>
+      </select>
+    </div>
+
     <!-- Active filter chips -->
     <div class="col">
       {% if category != 'all' %}
       <span class="badge bg-primary me-1">
         {{ category | capitalize }}
-        <a href="{{ url_for('gallery', sort=sort, per_page=per_page) }}" class="text-white ms-1 text-decoration-none">×</a>
+        <a href="{{ url_for('gallery', sort=sort, per_page=per_page, xref_category=xref_category, xref_slug=xref_slug) }}" class="text-white ms-1 text-decoration-none">×</a>
       </span>
       {% endif %}
       {% if slug %}
       <span class="badge bg-secondary me-1">
         {{ slug }}
-        <a href="{{ url_for('gallery', category=category, sort=sort, per_page=per_page) }}" class="text-white ms-1 text-decoration-none">×</a>
+        <a href="{{ url_for('gallery', category=category, sort=sort, per_page=per_page, xref_category=xref_category, xref_slug=xref_slug) }}" class="text-white ms-1 text-decoration-none">×</a>
+      </span>
+      {% endif %}
+      {% if xref_category and xref_slug %}
+      <span class="badge bg-info me-1">
+        Cross-ref: {{ xref_category | capitalize }} = {{ xref_slug }}
+        <a href="{{ url_for('gallery', category=category, slug=slug, sort=sort, per_page=per_page) }}" class="text-white ms-1 text-decoration-none">×</a>
       </span>
       {% endif %}
     </div>
 
     <input type="hidden" name="page" value="1">
+    {% if xref_category %}<input type="hidden" name="xref_category" value="{{ xref_category }}">{% endif %}
+    {% if xref_slug %}<input type="hidden" name="xref_slug" value="{{ xref_slug }}">{% endif %}
   </div>
 </form>
 
@@ -113,10 +140,21 @@
        class="badge {% if category == 'detailers' %}bg-secondary{% else %}bg-light text-dark{% endif %} text-decoration-none px-3 py-2">
       Detailers
     </a>
-    <a href="{{ url_for('gallery', category='checkpoints', sort=sort, per_page=per_page) }}" 
+    <a href="{{ url_for('gallery', category='checkpoints', sort=sort, per_page=per_page) }}"
        class="badge {% if category == 'checkpoints' %}bg-dark{% else %}bg-light text-dark{% endif %} text-decoration-none px-3 py-2">
       Checkpoints
     </a>
+    <span class="text-muted small mx-1">|</span>
+    <a href="{{ url_for('gallery', category='presets', sort=sort, per_page=per_page) }}"
+       class="badge {% if category == 'presets' %}text-white{% else %}bg-light text-dark{% endif %} text-decoration-none px-3 py-2"
+       {% if category == 'presets' %}style="background-color: #6f42c1"{% endif %}>
+      Presets
+    </a>
+    <a href="{{ url_for('gallery', category='generator', sort=sort, per_page=per_page) }}"
+       class="badge {% if category == 'generator' %}text-white{% else %}bg-light text-dark{% endif %} text-decoration-none px-3 py-2"
+       {% if category == 'generator' %}style="background-color: #20c997"{% endif %}>
+      Generator
+    </a>
   </div>
 </div>
 
@@ -222,6 +260,9 @@
     'styles':      'warning',
     'detailers':   'secondary',
     'checkpoints': 'dark',
+    'looks':       'primary',
+    'presets':     'purple',
+    'generator':   'teal',
   } %}
   {% for img in images %}
   <div class="gallery-card"
@@ -237,6 +278,8 @@
     <span class="cat-badge badge bg-{{ cat_colors.get(img.category, 'secondary') }}">
       {{ img.category[:-1] if img.category.endswith('s') else img.category }}
     </span>
+    {% if img._sidecar.get('is_favourite') %}<span class="fav-badge" title="Favourite" onclick="event.stopPropagation(); toggleImageFavourite('{{ img.path }}', this)">&#9733;</span>{% else %}<span class="fav-badge fav-off" title="Mark as favourite" onclick="event.stopPropagation(); toggleImageFavourite('{{ img.path }}', this)">&#9734;</span>{% endif %}
+    {% if img._sidecar.get('is_nsfw') %}<span class="nsfw-badge badge bg-danger" style="position:absolute;top:4px;right:4px;font-size:0.6rem;">NSFW</span>{% endif %}
     
     <!-- Info View Additional Metadata -->
     <div class="info-meta">
@@ -280,8 +323,12 @@
         <a href="{{ url_for('checkpoint_detail', slug=img.slug) }}"
            class="btn btn-sm btn-outline-light py-0 px-2"
            onclick="event.stopPropagation()">Open</a>
+        {% elif img.category in ('presets', 'generator') %}
+        <a href="{{ url_for('preset_detail', slug=img.slug) }}"
+           class="btn btn-sm btn-outline-light py-0 px-2"
+           onclick="event.stopPropagation()">Preset</a>
         {% else %}
-        <a href="{{ url_for('generator') }}?{{ img.category[:-1] }}={{ img.slug }}"
+        <a href="{{ url_for('generator') }}?preset={{ img.slug }}"
            class="btn btn-sm btn-outline-light py-0 px-2"
            onclick="event.stopPropagation()">Generator</a>
         {% endif %}
@@ -376,6 +423,12 @@
             <div class="meta-grid" id="metaGrid"></div>
           </div>
 
+          <!-- Cross-reference entity chips (from sidecar) -->
+          <div class="mb-3 d-none" id="xrefRow">
+            <label class="form-label fw-semibold mb-1">Used Entities</label>
+            <div class="d-flex flex-wrap gap-1" id="xrefContainer"></div>
+          </div>
+
           <div id="noMetaMsg" class="d-none">
             <p class="text-muted small fst-italic mb-0">No generation metadata found in this image.</p>
           </div>
@@ -409,7 +462,31 @@
 {% endblock %}
 
 {% block scripts %}
+<style>
+.fav-badge { position: absolute; top: 4px; left: 4px; font-size: 1.2rem; color: #ffc107; cursor: pointer; text-shadow: 0 0 3px rgba(0,0,0,0.7); z-index: 2; }
+.fav-badge.fav-off { color: rgba(255,255,255,0.5); }
+.fav-badge:hover { transform: scale(1.2); }
+</style>
 <script>
+async function toggleImageFavourite(path, el) {
+  const resp = await fetch('/gallery/image/favourite', {
+    method: 'POST', headers: {'Content-Type': 'application/json'},
+    body: JSON.stringify({path})
+  });
+  const data = await resp.json();
+  if (data.success) {
+    el.innerHTML = data.is_favourite ? '&#9733;' : '&#9734;';
+    el.classList.toggle('fav-off', !data.is_favourite);
+  }
+}
+async function toggleImageNsfw(path, el) {
+  const resp = await fetch('/gallery/image/nsfw', {
+    method: 'POST', headers: {'Content-Type': 'application/json'},
+    body: JSON.stringify({path})
+  });
+  const data = await resp.json();
+  if (data.success) location.reload();
+}
 // ---- Prompt modal ----
 let promptModal;
 document.addEventListener('DOMContentLoaded', () => {
@@ -473,15 +550,55 @@ async function showPrompt(imgPath, name, category, slug) {
     document.getElementById('noMetaMsg').classList.toggle('d-none',
       !!(data.positive || loras.length || hasParams));
 
+    // Cross-reference entity chips (from sidecar)
+    const xrefContainer = document.getElementById('xrefContainer');
+    const xrefRow = document.getElementById('xrefRow');
+    xrefContainer.innerHTML = '';
+    if (data.sidecar) {
+      const sc = data.sidecar;
+      const xrefColors = {
+        character: 'primary', outfit: 'success', action: 'danger',
+        style: 'warning', scene: 'info', detailer: 'secondary',
+        look: 'primary', preset: 'purple'
+      };
+      for (const [key, sidecarKey] of [
+        ['character', 'character_slug'], ['outfit', 'outfit_slug'],
+        ['action', 'action_slug'], ['style', 'style_slug'],
+        ['scene', 'scene_slug'], ['detailer', 'detailer_slug'],
+        ['look', 'look_slug'], ['preset', 'preset_slug']
+      ]) {
+        const val = sc[sidecarKey];
+        if (!val) continue;
+        const chip = document.createElement('a');
+        chip.className = `badge bg-${xrefColors[key] || 'secondary'} text-decoration-none`;
+        chip.href = `/gallery?xref_category=${key}&xref_slug=${encodeURIComponent(val)}`;
+        chip.textContent = `${key}: ${sc[sidecarKey.replace('_slug', '_name')] || val}`;
+        chip.title = `Show all images using this ${key}`;
+        xrefContainer.appendChild(chip);
+      }
+      xrefRow.classList.toggle('d-none', xrefContainer.children.length === 0);
+    } else {
+      xrefRow.classList.add('d-none');
+    }
+
     // Generator link
-    const genUrl = category === 'characters'
-      ? `/character/${slug}`
-      : category === 'checkpoints'
-        ? `/checkpoint/${slug}`
-        : `/generator?${category.replace(/s$/, '')}=${encodeURIComponent(slug)}`;
+    let genUrl, genLabel;
+    if (category === 'characters') {
+      genUrl = `/character/${slug}`;
+      genLabel = 'Open';
+    } else if (category === 'checkpoints') {
+      genUrl = `/checkpoint/${slug}`;
+      genLabel = 'Open';
+    } else if (category === 'presets' || category === 'generator') {
+      genUrl = `/generator?preset=${encodeURIComponent(slug)}`;
+      genLabel = 'Open in Generator';
+    } else {
+      genUrl = `/generator?${category.replace(/s$/, '')}=${encodeURIComponent(slug)}`;
+      genLabel = 'Open in Generator';
+    }
     const genBtn = document.getElementById('openGeneratorBtn');
     genBtn.href = genUrl;
-    genBtn.textContent = (category === 'characters' || category === 'checkpoints') ? 'Open' : 'Open in Generator';
+    genBtn.textContent = genLabel;
   } catch (e) {
     document.getElementById('promptPositive').value = 'Error loading metadata.';
   } finally {